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United States Patent | 5,530,694 |
Guezou ,   et al. | June 25, 1996 |
A device for connecting a station to a local area network comprising at least one ring includes switching arrangements associated with circuits for regenerating a signal in order to bypass a station when it is out of service and compensate the attenuation and phase jitter caused by the upstream ring segment. This device enables any number of stations to be taken out of service without seriously degrading operation of a ring. The device is usable in local area networks comprising one or more high-speed (125 Mbauds) rings.
Inventors: | Guezou; Jean (Lannion, FR); Lassaux; Jean (Lannion, FR) |
Assignee: | Societe Dite Alcatel N.V. (Amsterdam, NL) |
Appl. No.: | 083190 |
Filed: | June 29, 1993 |
Jul 10, 1992[FR] | 92 08613 |
Current U.S. Class: | 370/223; 340/825.01; 370/516 |
Intern'l Class: | H04L 012/437 |
Field of Search: | 370/16.1,85.5,16,85.13,85.1,85.4,85.14,85.15 371/8.2,8.1,20.5,20.6,11.1,11.2 340/827,825.05,825.01 379/221,220 395/181,182.01 |
4747097 | May., 1988 | Ohya et al. | 370/16. |
5179548 | Jan., 1993 | Sandesara | 370/16. |
5218600 | Jun., 1993 | Schenkyr et al. | 370/16. |
Foreign Patent Documents | |||
0089276 | Sep., 1983 | EP. | |
WO83/00238 | Jan., 1983 | WO. |
International Conference On Communications, vol. 3, Jun. 1982, New York, USA, pp. 6C.3.1-6C.3.5, M. Tada et al.: "N6770 Datalink--A Homogeneous Optical Ring Network". |